Free planetarium

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HarbingerDawn
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Astrophotography

03 May 2017 19:32

Watsisname wrote:
Source of the post Getting bigger and bigger!

Actually Venus is getting smaller right now. Unless you mean me getting bigger images of it as time goes on?
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Watsisname
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Astrophotography

03 May 2017 20:26

Should have said wider -- I meant the phase of it. :)
 
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HarbingerDawn
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Astrophotography

04 May 2017 04:01

Watsisname wrote:
Should have said wider -- I meant the phase of it. :)

Ah, ok :)
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A-L-E-X
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Astrophotography

07 May 2017 18:33

Got some pollution-removing advice and commentary about the different pollution-removing techniques we've discussed here.

https://www.dpreview.com/forums/post/59464442
 
SonofStars
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Astrophotography

07 May 2017 23:59

Here are some photos of the Sun I took a few weeks ago. These were processed using AutoStakkert, RegiStax 6, and Photoshop. 

Equipment Used:
ZWO ASI 174 MM camera
Lunt 60T/PT telescope
Orion Atlas Pro in Alt/Az mode.
Attachments
Sun_162046_Rotated.jpg
Sun, 31 March 2017
Sun_182618P Post.jpg
Sun, 19 March 2017
Sun_161415_g3_b3_ap198_Photoshop.jpg
Sun, 31 March 2017
Sun_161415_g3_b3_ap198_Photoshop.jpg (78.28 KiB) Viewed 825 times
 
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Watsisname
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Astrophotography

08 May 2017 01:31

Wow, you captured incredible details.  I'm jealous of your equipment. :)
 
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DoctorOfSpace
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Astrophotography

08 May 2017 05:47

Crikey those are some impressive images 
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Watsisname
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Astrophotography

09 May 2017 04:06

Just got my shot to complete the comparison of the full moon at perigee and apogee (or at least fairly close to those times).  Each image is a stack of exposures processed in Registax, all taken with the same camera, lens, and 300mm zoom, and at 100% crop to preserve the image size directly from the sensor.

Image

The distance and angular diameters listed are calculated by emphemeris in Virtual Moon Atlas.  The predicted ratio of diameters is 1.137.  By pixel measurement in Gimp, I calculate a ratio of about 1.15.  Pretty good agreement, and I'm not sure what might account for the discrepancy except that perhaps because it is a zoom lens I did not achieve precisely the same focal length.

Besides the obvious difference in size when compared side by side, I think it's also pretty neat to see how the Moon wobbles. This allows us to see quite a bit more than just 50% of the Moon from the Earth.
 
A-L-E-X
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Astrophotography

24 May 2017 23:04

DoctorOfSpace wrote:
Crikey those are some impressive images 

I wonder what filter he used!
 
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Watsisname
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Astrophotography

25 May 2017 00:34

The classic Hydrogen Alpha. :)
 
A-L-E-X
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Astrophotography

25 May 2017 11:51

Watsisname wrote:
The classic Hydrogen Alpha. :)

That's a really good filter for emission nebulae too! :)
 
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Gnargenox
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Astrophotography

07 Jun 2017 02:58

I've never owned a telescope before. I've never tried astrophotography before. So this is my first attempt in the crudest, rudest, most basic and ham-fisted way possible. I don't think you can get more amateurish than this, other than poking a hole in piece of paper during a solar eclipse and snapping a picture of that projected on the ground.

Taken with a LG L41C cellphone held up to the F12mm (120x magnification) eyepiece of a Vivitar 50600 telescope. 600mm focal length, 50mm refractor mirror, & Blue coated 46x7.3mm objective lens.  For $9.99 & a few minutes, I'm fairly pleased. I am surprised at some of the colors though.

The large dark spec is dust material somewhere on one of the telescope's lenses.
My First Photo of the Moon.png
Attachments
My First Photo of the Moon (labeled).png
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FastFourierTransform
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Astrophotography

07 Jun 2017 03:42

In armony with "the crudest, rudest, most basic and ham-fisted" astrophotograpy I've done the crudest astroediting of your image to enhance its attributes (just touching brightness and contrast in photoshop very rapidly).

And you image have more detail than it seems :D

My First Photo of the Moon.png
 
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Gnargenox
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Astrophotography

07 Jun 2017 08:58

Holy cow! I can't believe it had that much hidden info. It certainly looked better on my phone screen than it does on my monitor. Was that just using the auto contrast, auto levels and auto color buttons? Thanks!
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Watsisname
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Astrophotography

07 Jun 2017 17:31

Gnargenox wrote:
Source of the postI've never owned a telescope before. I've never tried astrophotography before. So this is my first attempt in the crudest, rudest, most basic and ham-fisted way possible.

Heyyyy, gotta start somewhere!  Now you're part of the club! :D
Gnargenox wrote:
Source of the post I am surprised at some of the colors though.

Ah, the infamous purple fringing, an effect of chromatic aberration.  Mostly this is a consequence of lenses being lenses, but there are techniques to help mitigate it or you can try correcting it in post processing.  Usually it's not a big deal though. :)
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